A device for compensating the parallelism of the upper and lower tables of a high-speed press during hot and cold machine states

Abstract

The present invention relates to a device for compensating the parallelism of the upper and lower surfaces of a high-speed press in a cold and hot state. The device comprises a high-speed press body, an oil supply mechanism and a cooling mechanism; the high-speed press body comprises a crossbeam, a slider, a worktable, left and right columns and a base, an oil pool is arranged in the crossbeam, an oil tank is arranged in the base, and an oil supply pipeline is arranged in the left and right columns; the lubricating oil pump extracts lubricating oil from the oil tank of the base and gathers it in the oil pool of the crossbeam; a part of the lubricating oil in the oil pool flows back to the oil tank of the base through the oil supply pipeline in the left and right columns, and the other part flows to the slider and flows back to the oil tank of the base through the oil supply pipeline in the left and right columns. On the basis of the original circulating oil lubrication system of the high-speed press, the present invention adds a cooling oil spray mechanism, a circulating oil self-heating mechanism, a circulating oil cooling mechanism, an induction heating mechanism, etc., to compensate for the parallelism of the upper and lower surfaces, thereby improving the operation accuracy of the press and ensuring the high-speed precision stamping requirements of the ultra-thin material thickness of the current motor core stator and rotor.

Description

Technical Field

[0001] The invention relates to a device for compensating the parallelism deviation of the upper and lower tables of a high-speed press in a cold or hot state, and in particular to a device for compensating the parallelism deviation of the upper and lower tables of a high-speed press in a cold or hot state. Background Art

[0002] With the advent of Industry 4.0 and the continuous development of automation and informatization, the scope of use of motors is becoming more and more extensive, and the requirements for motors are becoming higher and higher. The thickness of the motor core stator and rotor has been gradually reduced from 0.5mm to 0.35mm, 0.25mm and even 0.2mm. As the core components of the motor, the accuracy of the core stator and rotor will directly affect the quality of the motor. The thinner the core material, the smaller the gap between the concave and convex dies in the mold must be, and the corresponding precision requirements for the press are higher. At the same time, in order to save materials and improve efficiency, the shape of the stator and rotor molds must also be longer, so the table surface of the high-speed punching machine using this mold must also be longer.

[0003] As a professional machine for the iron core stator and rotor stamping industry, ordinary high-speed presses can no longer meet the production needs of this type of products. At present, high-speed presses are constantly developing in the direction of higher speeds and longer tables, and have developed from the early four-point spindle support and double-link force mechanism to six-point / eight-point spindle support and three-link / four-link force mechanism. The higher the speed, the greater the heat energy generated inside the press; the longer the table, the more spindle friction pairs used for support and the number of crank friction pairs and connecting rod friction pairs used for force, and the correspondingly greater heat energy is also generated. The greater the heat energy, the greater the thermal deformation generated by the press. Thermal deformation error is the main factor affecting the accuracy of high-speed presses, especially the parallelism of the upper and lower tables. Summary of the invention

[0004] The purpose of the present invention is to provide a device for compensating the parallelism of the upper and lower surfaces of a high-speed press when the upper and lower surfaces are in the cold and hot states, which can compensate for the parallelism of the upper and lower surfaces, improve the operating accuracy of the press, and meet the current needs of high-speed precision stamping of ultra-thin materials of the stator and rotor of the motor core, so as to meet the problems existing in the prior art.

[0005] The technical solution of the present invention is: a device for compensating the parallelism of the upper and lower tables of a high-speed press in the cold and hot states, the device comprising a high-speed press main body, an oil supply mechanism and a cooling mechanism;

[0006] The high-speed press machine body comprises a crossbeam, a slider, a worktable, left and right columns and a base, an oil pool is arranged in the crossbeam, an oil tank is arranged in the base, and oil supply pipelines are arranged in the left and right columns;

[0007] The oil supply mechanism includes a lubricating oil pump, a pressure filter, a main shaft friction pair, a crank friction pair, a connecting rod friction pair, a ball head friction pair, and a guide column friction pair;

[0008] The cooling mechanism includes a stop valve, a filter and a lubrication system oil cooler;

[0009] The lubricating oil pump draws lubricating oil from the oil tank of the base, and after filtering through the pressure filter, the lubricating oil is supplied to the main shaft friction pair, the crank friction pair and the connecting rod friction pair, and is gathered in the oil pool of the crossbeam; a part of the lubricating oil in the oil pool flows back to the oil tank of the base through the oil supply pipelines in the left and right columns, and the other part flows to the slider to lubricate the ball head friction pair and the guide column friction pair, and flows back to the oil tank of the base through the oil supply pipelines in the left and right columns;

[0010] The device further comprises a cooling oil spray mechanism, which is arranged in the cross beam and comprises a plurality of nozzles. After the lubricating oil in the oil tank of the base is cooled by the oil cooler of the lubricating system, a part of the lubricating oil flows back to the oil tank of the base, and the other part is supplied to the nozzle to spray the inside of the cross beam.

[0011] The device further comprises a circulating oil self-heating mechanism, which is arranged in the base, and comprises an oil tank arranged in the base, and the oil tank comprises an oil tank A, an oil tank B, an oil tank C, and an oil tank D which are layered in upper and lower layers, wherein the oil tank A and the oil tank B are arranged in the upper layer, and the oil tank C and the oil tank D are arranged in the lower layer, and the oil tank A and the oil tank D are arranged on one side of the base, and the oil tank B and the oil tank C are arranged on the other side of the base, and lubricating oil pipelines which are connected from left to right are respectively arranged between the oil tank A and the oil tank B, and between the oil tank C and the oil tank D;

[0012] The device also includes an induction heating mechanism, which includes multiple temperature sensing sheets 1, multiple temperature sensing sheets 2, multiple induction heating tubes 1, multiple induction heating tubes 2 and a PLC control mechanism. The temperature sensing sheet 1 and the induction heating tube 1 are arranged on the slider, and the temperature sensing sheet 2 and the induction heating tube 2 are arranged on the base. The PLC control mechanism collects the real-time temperatures T1 and T2 of the slider and the base collected by the temperature sensing sheet 1 and the temperature sensing sheet 2, and controls the opening and closing of the induction heating tube 1 and the induction heating tube 2.

[0013] Furthermore, the device also includes a circulating oil cooling mechanism, which is arranged in the slider, and the circulating oil cooling mechanism includes a U-shaped cooling oil pipeline, and the U-shaped cooling oil pipeline is connected to the lubrication system oil cooler. The cooling oil is supplied to the U-shaped cooling oil pipeline through the lubrication system oil cooler, and then flows back to the lubrication system oil cooler.

[0014] The beneficial effects of the present invention are:

[0015] (1) After the cold lubricating oil is directly sprayed on the crossbeam, part of the heat generated by the relative movement of the main shaft friction pair, the crank friction pair, and the connecting rod friction pair is neutralized. At the same time, after the cold oil is mixed with the hot oil, the overall oil temperature inside the crossbeam is reduced, which alleviates the thermal expansion of the crossbeam and the slider, thereby compensating to a certain extent for the deviation of the parallelism of the upper and lower surfaces in the cold and hot states;

[0016] (2) Lubricating oil pipelines are respectively provided between oil tank A and oil tank B, and between oil tank C and oil tank D. When the two groups of hot lubricating oil flow through the lubricating oil pipelines on the base, the heat carried by the two groups of hot lubricating oil will dissipate and affect the base, thereby heating the base. The base will expand in the left and right directions when heated, and the positions of the left and right columns will shift outwards. At this time, the expansion of the slider in the left and right directions will be alleviated and the change in the vertical direction will be reduced, thereby compensating to a certain extent for the deviation of the parallelism of the upper and lower surfaces when the machine is in the cold and hot states;

[0017] (3) A U-shaped cooling oil pipeline is added to the inside of the slider. The oil cooler of the lubrication system directly supplies cold oil to the inside of the slider. The cold oil circulates continuously in the U-shaped pipeline and directly cools the slider, reducing the impact of hot oil on the slider. It can significantly reduce the thermal expansion of the slider in the left and right directions and reduce the change in the vertical direction, thereby compensating for the deviation in the parallelism of the upper and lower surfaces in the cold and hot states;

[0018] (4) Since the thermal expansion of metal parts is linearly related to temperature, temperature sensors are installed on the slider and the base respectively to collect the real-time temperatures T1 and T2 of the slider and the base. The T1 and T2 data are processed by logic algorithm through the press PLC control mechanism. According to the logic algorithm of T1 and T2 data, the operation of the induction heating tube is controlled to compensate for the temperature difference between the slider and the base in real time. The thermal expansion of the slider and the base in the left and right directions can be significantly synchronized, and the change of the slider in the vertical direction can be reduced, thereby compensating for the deviation of the parallelism of the upper and lower surfaces in the cold and hot states. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 This is a schematic diagram of the parallelism of the upper and lower tables when the machine is in the cold state.

[0021] Figure 3 This is a schematic diagram of the parallelism of the upper and lower tables when the engine is in the hot state.

[0022] Figure 4 It is a structural diagram of the cooling oil spray mechanism.

[0023] Figure 5 It is a structural diagram of the circulating oil self-heating mechanism.

[0024] Figure 6 It is a structural diagram of the circulating oil cooling mechanism.

[0025] Figure 7 It is a structural schematic diagram of the induction heating mechanism.

[0026] Figure 8 It is a schematic diagram of the installation structure of the induction heating tube 2.

[0027] In the figure, 1 is a crossbeam, 2 is a main shaft friction pair, 3 is a crank friction pair, 4 is a connecting rod friction pair, 5 is a slider, 6 is a worktable, 7 is a ball head friction pair, 8 is a guide column friction pair, 9 is a left and right column, 10 is a base, 11 is a pressure filter, 12 is a lubricating oil pump, 13 is a stop valve, 14 is a filter, 15 is a lubrication system oil cooler, 16 is a nozzle, 17 is a U-shaped cooling oil pipeline, 18 is a temperature sensor sheet 1, 19 is a temperature sensor sheet 2, and 20 is an induction heating tube 2. DETAILED DESCRIPTION

[0028] A device for compensating the parallelism of the upper and lower tables of a high-speed press machine when the machine is in a cold or hot state, the device comprising a high-speed press machine body, an oil supply mechanism and a cooling mechanism;

[0029] The high-speed press machine body comprises a crossbeam 1, a slide block 5, a work table 6, left and right columns 9 and a base 10. An oil pool is provided in the crossbeam 1, an oil tank is provided in the base 10, and an oil supply pipeline is provided in the left and right columns 9;

[0030] The oil supply mechanism includes a lubricating oil pump 12, a pressure filter 11, a main shaft friction pair 2, a crank friction pair 3, a connecting rod friction pair 4, a ball head friction pair 7, and a guide column friction pair 8;

[0031] The cooling mechanism includes a stop valve 13, a filter 14 and a lubrication system oil cooler 15;

[0032] The lubricating oil pump 12 extracts lubricating oil from the oil tank of the base 10, and after filtering through the pressure filter 11, the lubricating oil is supplied to the main shaft friction pair 2, the crank friction pair 3 and the connecting rod friction pair 4, and is gathered in the oil pool of the crossbeam 1; a part of the lubricating oil in the oil pool flows back to the oil tank of the base 10 through the oil supply pipelines in the left and right columns 9, and the other part flows to the slider 5 to lubricate the ball head friction pair 7 and the guide column friction pair 8, and flows back to the oil tank of the base 10 through the oil supply pipelines in the left and right columns 9;

[0033] The device further comprises a cooling oil spray mechanism, which is arranged in the cross beam 1 and comprises a plurality of nozzles 16. After the lubricating oil in the oil tank of the base 10 is cooled by the oil cooler of the lubricating system, a part of the lubricating oil flows back to the oil tank of the base 10, and the other part is supplied to the nozzles 16 to spray the inside of the cross beam 1.

[0034] The device also includes a circulating oil self-heating mechanism, which is arranged in the base 10. The circulating oil self-heating mechanism includes an oil tank arranged in the base 10. The oil tank includes an oil tank A, an oil tank B, an oil tank C, and an oil tank D which are layered in upper and lower layers. The oil tank A and the oil tank B are arranged in the upper layer, and the oil tank C and the oil tank D are arranged in the lower layer. The oil tank A and the oil tank D are arranged on one side of the base 10, and the oil tank B and the oil tank C are arranged on the other side of the base 10. Lubricating oil pipelines that pass through left and right are respectively arranged between the oil tank A and the oil tank B, and between the oil tank C and the oil tank D;

[0035] The device also includes an induction heating mechanism, which includes a plurality of temperature sensing sheets 18, a plurality of temperature sensing sheets 19, a plurality of induction heating tubes 1, a plurality of induction heating tubes 20 and a PLC control mechanism. The temperature sensing sheet 18 and the induction heating tube 1 are arranged on the slider 5, and the temperature sensing sheet 2 19 and the induction heating tube 2 20 are arranged on the base 10. The PLC control mechanism collects the real-time temperatures T1 and T2 of the slider 5 and the base 10 collected by the temperature sensing sheet 18 and the temperature sensing sheet 2 19, and controls the opening and closing of the induction heating tube 1 and the induction heating tube 2 20.

[0036] The device also includes a circulating oil cooling mechanism, which is arranged in the slider 5. The circulating oil cooling mechanism includes a U-shaped cooling oil pipeline 17. The U-shaped cooling oil pipeline 17 is connected to the lubrication system oil cooler 15. The cooling oil is supplied to the U-shaped cooling oil pipeline 17 through the lubrication system oil cooler 15, and then flows back to the lubrication system oil cooler 15.

[0037] In the cold state, there is no relative movement inside the press, so no heat energy is generated, and it will not affect the parallelism of the upper and lower tables of the press. At this time, we believe that the parallelism of the upper and lower tables on the left, middle and right are approximately equal, all of which are H1 values;

[0038] In the hot engine state, due to the high-speed relative movement of the friction pairs of the press, a large amount of heat energy will be generated inside the crossbeam 1 and the slider 5. Metal parts expand due to heat. The larger the shape and the higher the temperature, the greater the corresponding expansion. Since the slider 5 is limited by the position of the left and right columns 9 in the left and right directions and cannot be displaced in this direction, it can only deform in the vertical direction with a value of H2 and change into an arch. At this time, the parallelism of the upper and lower surfaces of the press will deviate. The longer the left and right lengths of the slider 5 and the worktable 6, the greater the deviation will be. At this time, the parallelism of the upper and lower surfaces is H3≈H4<H2.

[0039] Due to the large amount of heat energy generated by the relative movement of the six sets of spindle friction pairs 2, the three sets of crank friction pairs 3, and the three sets of connecting rod friction pairs 4 in the crossbeam 1, the temperature of the lubricating oil stored in the oil pool inside the crossbeam 1 is very high, and this part of the hot oil passes through the slider 5, which will also affect the slider 5. After the cold lubricating oil is directly sprayed on the crossbeam 1, part of the heat generated by the relative movement of the spindle friction pair 2, the crank friction pair 3, and the connecting rod friction pair 4 is neutralized. At the same time, after the cold oil is mixed with the hot oil, the overall oil temperature inside the crossbeam 1 is reduced, which alleviates the thermal expansion of the crossbeam 1 and the slider 5, thereby compensating to a certain extent for the deviation of the parallelism of the upper and lower surfaces in the cold and hot states;

[0040] The oil tank includes oil tank A, oil tank B, oil tank C, and oil tank D which are layered in upper and lower layers. Lubricating oil pipelines which penetrate left and right are respectively arranged between the oil tank A and the oil tank B, and between the oil tank C and the oil tank D. When the two groups of hot lubricating oil flow through the lubricating oil pipelines which penetrate left and right on the base 10, the heat carried by the two groups of hot lubricating oil will dissipate and affect the base 10, playing a role in heating the base 10. The base 10 will expand in the left and right directions when heated, and drive the positions of the left and right columns 9 to shift outwards. At this time, the expansion amount of the slider 5 in the left and right directions will be alleviated, and the change amount in the vertical direction will be reduced, thereby compensating to a certain extent for the deviation of the parallelism of the upper and lower tables in the cold and hot states;

[0041] Since the lubricating oil inside the slider 5 comes from the hot oil diverted by the crossbeam 1, the relative movement of the three sets of ball head friction pairs 7 and the four sets of guide column friction pairs 8 will also generate a lot of heat energy, which will affect the overall temperature of the slider 5 and cause thermal expansion in the left and right directions. Therefore, a U-shaped cooling oil pipeline 17 is added to the inside of the slider 5, and the lubrication system oil cooler 15 directly supplies cold oil to the inside of the slider 5. The cold oil circulates continuously in the U-shaped cooling oil pipeline 17 and directly cools the slider 5, reducing the impact of hot oil on the slider 5, which can significantly reduce the thermal expansion of the slider 5 in the left and right directions, and reduce the change in the vertical direction, thereby compensating for the deviation of the parallelism of the upper and lower surfaces in the cold and hot states;

[0042] Since the thermal expansion of metal parts is linearly related to the temperature, temperature sensors are installed on the slider 5 and the base 10 respectively, and the real-time temperatures T1 and T2 of the slider 5 and the base 10 are collected. The T1 and T2 data are processed by logic algorithm through the press PLC control mechanism. According to the logic algorithm of the T1 and T2 data, the operation of the induction heating tube is controlled to compensate for the temperature difference between the slider 5 and the base 10 in real time. The thermal expansion of the slider 5 and the base 10 in the left and right directions can be significantly synchronized, and the change of the slider 5 in the vertical direction can be reduced, thereby compensating for the deviation of the parallelism of the upper and lower surfaces in the cold and hot states.

[0043] In order to solve the problem that when the press is in a cold state and a hot state, the parallelism of the upper and lower tables changes and produces a certain deviation due to thermal deformation errors, which affects the precision of products punched and formed by the press. On the basis of the original circulating oil lubrication system of the high-speed press, a cooling oil spray mechanism, a circulating oil self-heating mechanism, a circulating oil cooling mechanism, an induction heating mechanism, etc. are added to compensate for the parallelism of the upper and lower tables, thereby improving the operating precision of the press and ensuring the current high-speed precision stamping requirements of ultra-thin material thickness of the stator and rotor of the motor core.

[0044] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0046] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can all be customized according to the description and the drawings.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for compensating the parallelism of the upper and lower tables of a high-speed press when the machine is in the cold or hot state. Features: The device comprises a high-speed press body, an oil supply mechanism and a cooling mechanism; The high-speed press machine body comprises a crossbeam (1), a slide block (5), a work table (6), left and right columns (9) and a base (10); an oil pool is provided in the crossbeam (1), an oil tank is provided in the base (10), and oil supply pipelines are provided in the left and right columns (9); The oil supply mechanism comprises a lubricating oil pump (12), a pressure filter (11), a main shaft friction pair (2), a crank friction pair (3), a connecting rod friction pair (4), a ball head friction pair (7), and a guide post friction pair (8); The cooling mechanism comprises a stop valve (13), a filter (14) and a lubrication system oil cooler (15); The lubricating oil pump (12) extracts lubricating oil from the oil tank of the base (10), and after filtering through the pressure filter (11), the lubricating oil is supplied to the main shaft friction pair (2), the crank friction pair (3) and the connecting rod friction pair (4), and then gathered in the oil pool of the crossbeam (1); a part of the lubricating oil in the oil pool flows back to the oil tank of the base (10) through the oil supply pipelines in the left and right columns (9), and the other part flows to the slider (5) to lubricate the ball head friction pair (7) and the guide column friction pair (8), and then flows back to the oil tank of the base (10) through the oil supply pipelines in the left and right columns (9); The device further comprises a cooling oil spray mechanism, the cooling oil spray mechanism being arranged in the crossbeam (1), the cooling oil spray mechanism comprising a plurality of nozzles (16), and after the lubricating oil in the oil tank of the base (10) is cooled by the lubricating system oil cooler (15), a portion of the lubricating oil flows back into the oil tank of the base (10), and another portion is supplied to the nozzles (16) to be sprayed on the inside of the crossbeam (1); The device further comprises a circulating oil self-heating mechanism, the circulating oil self-heating mechanism being arranged in the base (10), the circulating oil self-heating mechanism comprising an oil tank arranged in the base (10), the oil tank comprising an oil tank A, an oil tank B, an oil tank C, and an oil tank D which are layered in upper and lower layers, the oil tank A and the oil tank B being arranged in the upper layer, the oil tank C and the oil tank D being arranged in the lower layer, the oil tank A and the oil tank D being arranged on one side of the base (10), the oil tank B and the oil tank C being arranged on the other side of the base (10), and lubricating oil pipelines which are respectively provided between the oil tank A and the oil tank B and between the oil tank C and the oil tank D and which are respectively provided to pass therethrough from left to right; The device further comprises an induction heating mechanism, the induction heating mechanism comprising a plurality of temperature sensing sheets (18), a plurality of temperature sensing sheets (19), a plurality of induction heating tubes (1), a plurality of induction heating tubes (20) and a PLC control mechanism, the temperature sensing sheets (18) and the induction heating tubes (1) being arranged on the slider (5), the temperature sensing sheets (19) and the induction heating tubes (20) being arranged on the base (10), the PLC control mechanism collecting the real-time temperatures T1 and T2 of the slider (5) and the base (10) collected by the temperature sensing sheets (18) and the temperature sensing sheets (19), and controlling the opening and closing of the induction heating tubes (1) and the induction heating tubes (20).

2. A device for compensating the parallelism of the upper and lower tables of a high-speed press in the cold and hot states according to claim 1, Features: The device further comprises a circulating oil cooling mechanism, the circulating oil cooling mechanism being arranged in the slider (5), the circulating oil cooling mechanism comprising a U-shaped cooling oil pipeline (17), the U-shaped cooling oil pipeline (17) being connected to the lubrication system oil cooler (15), the cooling oil being supplied to the U-shaped cooling oil pipeline (17) through the lubrication system oil cooler (15), and then flowing back to the lubrication system oil cooler (15).

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